- Titel
- Magneto transport and magneto-thermal transport phenomena in altermagnets
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-1046346
- Übersetzter Titel (DE)
- Magnetotransport- und magnetothermische Transportphänomene in Altermagneten
- Erstveröffentlichung
- 2026
- Datum der Einreichung
- 25.11.2025
- Datum der Verteidigung
- 07.05.2026
- Abstract (EN)
- This thesis investigates magnetotransport and magnetothermal transport phenomena as powerful probes of magnetic symmetry in materials with complex magnetic structures, with a particular focus on emerging altermagnetic systems. Using electrical and thermal transport measurements as symmetry-sensitive probes, this work provides insights into the role of Berry curvature and hidden magnetic order in generating anomalous transverse responses. Three classes of materials were studied in detail. In MnTe, a magnetically compensated collinear magnet, clear signatures of the anomalous Hall and Nernst effects were observed. Detailed symmetry analysis and angle-dependent magnetoresistance measurements established the presence of anisotropic magnetoresistance linked to both spin and crystal symmetry. These results support the classification of MnTe as an altermagnet and position it as a model platform for studying spintronic phenomena in compensated magnetic systems. In RuO₂ thin films, systematic transport and magnetometry measurements across multiple crystallographic orientations revealed an anisotropic anomalous Hall signal and subtle orientation-dependent magnetic responses. These findings highlight the subtle interplay between magnetic order and crystallographic symmetry, contributing to ongoing debates regarding the magnetic nature of RuO₂. Finally, in the unexplored compound UCr₂Si₂C, magnetotransport revealed no evidence of magnetic order or anomalous transport. Though negative, these results help refine the search for viable altermagnetic candidates by eliminating a previously plausible system. Together, the results demonstrate how transport experiments, when combined with symmetry analysis and complementary measurements, can reveal hidden magnetic orders and enable discovery in emerging magnetic phases. This thesis lays the groundwork for future studies in altermagnetism and the development of efficient spintronic technologies.
- Freie Schlagwörter (EN)
- Altermagnets, Magnetotransport, magneto-thermal transport, Thin-films, MnTe, RuO₂
- Klassifikation (DDC)
- 530
- Klassifikation (RVK)
- VE 9857
- GutachterIn
- Prof. Dr. Hans-Henning Klauß
- Prof. Dr. Fèlix Casanova
- BetreuerIn Hochschule / Universität
- Prof. Dr. Bernd Büchner
- BetreuerIn - externe Einrichtung
- Dr. Helena Reichlová
- PD Dr. Andy Thomas
- Den akademischen Grad verleihende / prüfende Institution
- Technische Universität Dresden, Dresden
- Sonstige beteiligte Institution
- Czech Academy of Sciences (FZU), Karlova
- Leibnitz-Institut für Festkörper- und Werkstoffforschung Dresden (IFW), Dresden
- Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-1046346
- Veröffentlichungsdatum Qucosa
- 18.05.2026
- Dokumenttyp
- Dissertation
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
CC BY-NC-SA 4.0